Cyclic group representations for relation algebras ${57}_{65}$ and ${63}_{65}$

We exhibit finite cyclic group representations for relation algebras ${57}_{65}$ and ${63}_{65}$. As a consequence, of the ten symmetric integral RAs on four atoms having at least one flexible atom, all are now known to have a representation over a finite cyclic group except for ${33}_{65}$, which is not even known to be finitely representable.